What should I do if the pickup is silent?

What should I do if the pickup is silent? I believe that many users often encounter this problem when using pickups. This article summarizes several methods, hoping to help users:
1. Understand the customer's pickup model, place of purchase, date of purchase
2. Record customer information
3. Use a multimeter to measure the DC power supply voltage at the pickup head. The required voltage is between 8V and 20V.
4. If you have more than one pickup head, you can compare their cross-wiring to determine whether it is the pickup head or the connection cable or other ancillary equipment.
5. If the audio cable is connected to other audio equipment, please disconnect it and connect it directly to the normal active speaker for the Walkman headset / computer for testing. If the sound is normal, there is no problem with the pickup itself, please check the connected audio equipment or other aspects.
6. Whether the wiring is intact and reliable.
7. Whether the interface of the amplifying equipment is matched with the pickup head, and whether the volume of the amplifying equipment is adjusted properly.
8. It is strictly forbidden to connect the pickup head to the microphone (MIC) input terminal of the sound card, mixer, amplifier, etc., otherwise the device may be damaged. This is because although the microphone also includes a microphone, it also contains circuits such as amplification, noise reduction, and echo processing. The output is a "Line Out" audio signal above 1Vpp.

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